2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/107109The results of recent measurements of the cyclotron resonance (CR) spectra for a GaAs quantum well are interpreted in terms of the resonant magnetopolaron effect. Owing to this effect, the CR peaks split near the TO-phonon frequency and also change their positions with respect to those obtained without electron-phonon interaction. The theoretical peak positions of the CR spectra calculated within the many-polaron approach compare well with experimental data, as distinct from the CR energies calculated without electron-phonon interaction, which show no particular features in the region of the optical-phonon frequencies. We conclude that the Froehlich polaron concept is valid and even necessary to interpret the CR spectra of quantum wells.1 page, 1 figure, E-mail addresses: jozef.devreese@ua.ac.be, sergei.klimin@ua.ac.beMesoscale and Nanoscale Physicstext